And now you have.
Just had a look at my Windows 10 Pro with suggestions turned off and there aren't any ads like that. Or maybe it's because I've never downloaded a game.
However, if I had found one, it doesn't seem like it would be worth too much hysteria.... though I confess that the Chrome adverts on Google's search page actually do annoy me. Slightly.
Of course, I use Google Search much much more often than the Windows 10 start menu ;-)
It's a very useful 5GB, given that its part of the OS and you can save to it like an internal drive.
Of course, in the long run, Microsoft wants people o sign up for Office 365, which provides 1TB per person. That way you get 5TB of storage for peanuts, as well as the full desktop Office and integrated smartphone and tablet apps.
I double-checked to be sure. My "free" 15GB of storage in Gdrive is actually 0GB (ie zero, nada, nothing) because I have almost 15GB of email in Gmail.
The same amount of email in Outlook still leaves 5GB free in OneDrive, for new users. (I have 25GB because Microsoft grandfathered my earlier storage.)
If you're a normal person then you'll probably use 200MB (my wife) to 1.5GB (me) shooting jpegs. I checked my folders.
If you think 5GB of OneDrive is a suitable option for a pro/semipro/serious photographer shooting RAW then I suspect you may have more serious problems than OneDive...